Blue Box SIGMA 2002 - Page 34

Blue Box - 28
SUGGESTED HYDRAULIC CIRCUIT DIAGRAM FOR UNITS SIGMA 2002
LEGEND
1 Circulating pump
2 Expansion tank 3 Safety valve 4 Check valve
5 Ball valve 6 Tank 7 Water gauge
8 Thermometer 9 Water filter
10 Vent valve 11 Flexible connection 12 System filling valve 13 Water drain 14 Flow switch
* Only HP version